A028351 Dimension of invariant subspace of Lie polynomials of degree 2n under action of SL_2(C) on free Lie algebra of rank 2.

1, 0, 1, 1, 5, 9, 33, 85, 276, 827, 2693, 8626, 28639, 95393, 323367, 1104525, 3813797, 13266366, 46509357, 164098390

Offset

1,5

References

M. Bremner, Lie invariants of degree ten, Int. J. Math. Game Theory Algebra, 8 (1998), no. 2-3, 115-122.

C. Reutenauer, Free Lie Algebras, pages 206-208.

Links

Table of n, a(n) for n=1..20.

Crossrefs

Sequence in context: A270454 A323150 A116390 * A211952 A098640 A239546

Adjacent sequences: A028348 A028349 A028350 * A028352 A028353 A028354

Keyword

nonn,more

Author

Murray R. Bremner

Status

approved